# WBV2-P308-002: implement_capability_family_slice

- task: WBV2-P308-002
- parent: WBV2-P308-001
- status: planned
- gap: workflow:implement_capability_family_slice
- ownerFamily: IMPLEMENTATION
- targetImplementationClass: SOURCE_BACKED

## 目标

Implement the next uncovered Blender capability family from the source-backed index.

## 输入与范围

- Blender source authority: `blender-5.2.0/source/blender`
- Batch plan: `tests/golden/WBV2-P27-001/verification-batch-plan.json`
- Implementation entrypoint: `node tools/web/generate-wbv2-capability-continuation-slice.mjs --task WBV2-P308-002 --write`

## 验收

- 6900 inventory and provenance remain read-only
- capability-family deduplication is reused
- malformed, unsupported, hash-drift and false-completion input fails closed
- Chromium, E2E receipts and completion overlays remain deferred
- `node tools/web/check-task-context.mjs --task WBV2-P308-002 --write`

## 失败边界

- missing source or unsupported capability remains in_progress/blocked
- representative implementation is never declared as full-family parity

## 交付与回滚

- Reports: `tests/golden/WBV2-P308-002/`
- Status: `docs/status/WBV2-P308-002.md`
- Manifest: `tests/golden/WBV2-P308-002/manifest.json`
- Rollback: restore WBV2-P308-001 as queue parent and leave the task in_progress.